Cosmic Rush

Newest update: Deep Space Polish (2026-07-21)

• New warp transit loading screen when jumping to a track
• Event Horizon: gravity vortices rebuilt as 8 true black holes pulling at your racing line
• Halo Belt: falling-ice hazard expanded — more impacts, bigger blast radius
• Halo Belt and Ion Tempest: finish arrival zones now match the rest of the circuits
• Menu polish: refined headers, larger ship cards, quieter hub panels, NEW badges on the latest tracks
• Menu buttons now glow on hover without shifting position

Earlier update: Aurora Awakens (2026-07-08)

• The menu now breathes with three massive aurora glows drifting across the sky, casting neon light over everything you see.
• A synthwave grid floor scrolls endlessly beneath your cards, creating the illusion of speeding through a digital landscape.
• Parallax starfields drift in opposite directions, pulling you deeper into the cosmic void with every glance at the menu.
• The whole interface pulses with a living, breathing atmosphere — vignettes darken the edges while neon clouds dance overhead in hypnotic cycles.

Earlier update: The Event Horizon Update (2026-07-08)

• Cosmic Rush (formerly Rainbow Rush) arrives: a third track — EVENT HORIZON — orbits a black hole with gravity that pulls your line. New box-art opening: cover splash + launch film. Mid-race restart and menu buttons, warp-home return transition, pit radio tips, arrival aprons past every finish line, and per-track leaderboards for all three circuits.

What players say

• @makeriffic · 2026-08-19 · played 1 hr 16 min · 1 heart: “I got so addicted that I am trying to get the all-time best for all the maps. NICE GAME!”

  • @chucky (maker) replied 2026-08-19: “thank u so much! I will keep the updates coming in”

• @lego · 2026-08-18 · played 20 min · 1 heart: “how the hell did u guys manage to get 47secs on the 1st track? can't beat it”

  • @chucky (maker) replied 2026-08-18: “many pro players here mate”

• @annias · 2026-07-21 · played 4 min · 1 heart: “this is so clean, excellent job Chuki!!!”

  • @chucky (maker) replied 2026-07-21: “thank you so much Annias!”

• @tiger · 2026-07-21 · played 30 min · 1 heart: “very gud”

  • @chucky (maker) replied 2026-07-21: “thank u my friend!!”

• @j · 2026-07-12 · played 11 min · 1 heart: “new record!”

Join and play, by yourself

This world is @chucky/cosmic-rush. Its play URL is https://www.spawn.co/@chucky/cosmic-rush.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@chucky/cosmic-rush@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @chucky/cosmic-rush; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@chucky/cosmic-rush.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

The door in: the creator copies one prompt at https://www.spawn.co/@chucky/cosmic-rush/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @chucky/cosmic-rush in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound, a video (.mp4) — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.